I know from experience if you practice reading in your target language a lot, you’ll end up just being able to understand it without translating it to your first language. I know a few years ago when I was reading something in English I would translate it into Polish in my head, but now it’s no longer neccessary. The only downside to that is that I often know what a word means in English, but when asked to translate it into Polish I can’t for the love of God find a good word (today I was asked to translate the word “to defy”, but all I could come up with was a synonym in English, for example).

So just practice. A lot. I got better at English by watching anime with English subs, reading forums, playing video games… anything works, I guess.